:root{
  --bg:#0f2419; --panel:#16321f; --card:#ffffff; --ink:#13241b; --muted:#6b8377;
  --leaf:#2e7d52; --leaf2:#3da16f; --mint:#e8f5ee; --mint2:#d3ecdd;
  --ruby:#e25c5c; --gold:#f4b740; --line:#e2ece6;
  --radius:18px; --shadow:0 6px 24px rgba(13,40,28,.10);
  font-synthesis:none;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink); background:
    radial-gradient(1200px 600px at 80% -10%, #1e4530 0%, transparent 60%),
    radial-gradient(900px 500px at -10% 110%, #14502f 0%, transparent 55%),
    var(--bg);
  min-height:100vh;
}
a{color:var(--leaf2);text-decoration:none}
button{font:inherit;cursor:pointer}
.btn{border:0;border-radius:999px;padding:.6rem 1.1rem;background:var(--leaf);color:#fff;font-weight:600;box-shadow:var(--shadow)}
.btn:hover{background:var(--leaf2)}
.btn.ghost{background:#fff;color:var(--leaf);border:1px solid var(--line);box-shadow:none}
.btn.ruby{background:var(--ruby)}
.btn.sm{padding:.35rem .7rem;font-size:.85rem}
.btn.gold{background:var(--gold);color:#5a3d00}
.muted{color:var(--muted)}
.pill{display:inline-block;padding:.15rem .6rem;border-radius:999px;font-size:.75rem;font-weight:600}
.pill.learning{background:#fff4d6;color:#9a6b00}
.pill.done{background:#dff3e6;color:#1f7a45}
.pill.material{background:#e9e6ff;color:#5b46c9}

header.topbar{
  display:flex;align-items:center;gap:.8rem;padding:1rem 1.3rem;color:#eafff2;
}
.logo{display:flex;align-items:center;gap:.6rem;font-weight:800;letter-spacing:.2px}
.logo .leaf{font-size:1.5rem}
.logo small{display:block;font-weight:500;opacity:.8;font-size:.72rem}
.topbar .spacer{flex:1}
.topbar .who{font-size:.85rem;opacity:.9}

.wrap{max-width:1040px;margin:0 auto;padding:0 1.1rem 4rem}
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.2rem 1.3rem;margin:1rem 0}
.card h2{margin:.1rem 0 .9rem;font-size:1.15rem}
.grid{display:grid;gap:1rem}
@media(min-width:720px){.grid.cols2{grid-template-columns:1fr 1fr}.grid.cols3{grid-template-columns:repeat(3,1fr)}}

/* login */
.login{min-height:72vh;display:flex;align-items:center;justify-content:center}
.login .card{max-width:420px;width:100%;text-align:center;padding:2.2rem 1.8rem}
.login h1{margin:.3rem 0 .2rem;font-size:1.5rem}
.gbtn{display:inline-flex;align-items:center;gap:.6rem;background:#fff;border:1px solid #dadce0;border-radius:999px;
  padding:.7rem 1.3rem;color:#3c4043;font-weight:600;box-shadow:var(--shadow);margin-top:1rem}
.gbtn:hover{background:#f7f8f8}
.gicon{width:18px;height:18px}
.devbox{margin-top:1.6rem;border-top:1px dashed var(--line);padding-top:1rem;text-align:left}
.devbox input{width:100%;padding:.55rem .7rem;border:1px solid var(--line);border-radius:10px;margin:.3rem 0}

/* student cards / tables */
.studentlist{display:grid;gap:.7rem}
.srow{display:flex;align-items:center;gap:.8rem;padding:.8rem 1rem;border:1px solid var(--line);border-radius:14px;background:#fff}
.srow:hover{border-color:var(--leaf2)}
.avatar{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--mint);color:var(--leaf);font-weight:800}
.srow .meta{flex:1}
.srow .name{font-weight:700}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{text-align:left;padding:.5rem .55rem;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:600;font-size:.78rem;text-transform:uppercase;letter-spacing:.4px}
.tabbar{display:flex;gap:.4rem;margin:.2rem 0 1rem;flex-wrap:wrap}
.tab{padding:.45rem .9rem;border-radius:999px;background:var(--mint);color:var(--leaf);font-weight:600}
.tab.active{background:var(--leaf);color:#fff}
.sticker{font-size:1.2rem}
.kpis{display:flex;gap:1rem;flex-wrap:wrap;margin:.3rem 0 0}
.kpi{background:var(--mint);border-radius:14px;padding:.7rem 1rem;min-width:96px}
.kpi b{display:block;font-size:1.5rem;color:var(--leaf)}
.kpi span{font-size:.75rem;color:var(--muted)}
.rowact{display:flex;gap:.4rem}
.inlineform{display:grid;gap:.5rem;margin-top:.6rem}
.inlineform input,.inlineform select,.inlineform textarea{padding:.5rem .6rem;border:1px solid var(--line);border-radius:10px;font:inherit;width:100%}
@media(min-width:640px){.inlineform.row{grid-auto-flow:column;grid-auto-columns:1fr}}
.empty{color:var(--muted);padding:1rem 0;text-align:center}
.toast{position:fixed;bottom:1.2rem;left:50%;transform:translateX(-50%);background:#13241b;color:#eafff2;
  padding:.7rem 1.1rem;border-radius:999px;box-shadow:var(--shadow);opacity:0;transition:.25s;pointer-events:none}
.toast.show{opacity:1}
.studio-cta{display:flex;align-items:center;justify-content:space-between;gap:1rem;
  background:linear-gradient(120deg,#2e7d52,#3da16f);color:#fff;border-radius:var(--radius);padding:1.1rem 1.3rem}
.studio-cta .btn{background:#fff;color:var(--leaf)}

/* ===== marketing homepage ===== */
.home{color:var(--ink)}
.navbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:.7rem;
  padding:.6rem 1.1rem;background:rgba(255,255,255,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.navbar img{height:38px;width:38px;border-radius:50%;object-fit:cover}
.navbar b{font-weight:800}.navbar small{display:block;color:var(--muted);font-size:.68rem;font-weight:500}
.navbar .links{flex:1;display:none;gap:1.1rem;margin-left:1rem}
.navbar .links a{color:var(--ink);font-weight:600;font-size:.92rem}
@media(min-width:780px){.navbar .links{display:flex}}
.hero{position:relative;min-height:78vh;display:flex;align-items:center;justify-content:center;text-align:center;
  background-size:cover;background-position:center;color:#fff;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,30,18,.32),rgba(7,30,18,.62))}
.hero .inner{position:relative;z-index:2;max-width:720px;padding:3rem 1.3rem}
.hero .badge{width:128px;height:128px;border-radius:50%;object-fit:cover;box-shadow:0 10px 40px rgba(0,0,0,.35);border:4px solid rgba(255,255,255,.85)}
.hero h1{font-size:2.5rem;margin:1rem 0 .3rem;text-shadow:0 3px 18px rgba(7,30,18,.5)}
.hero .cn{font-size:1.05rem;opacity:.92;letter-spacing:.18em}
.hero .tag{font-size:1.15rem;margin:1rem auto 1.6rem;max-width:30ch;opacity:.96}
.hero .btn{font-size:1.02rem;padding:.8rem 1.5rem}
.hero .err{background:rgba(192,57,43,.9);display:inline-block;padding:.4rem .9rem;border-radius:999px;margin-bottom:1rem;font-size:.9rem}
.section{max-width:1040px;margin:0 auto;padding:3rem 1.2rem}
.section h2.title{font-size:1.7rem;text-align:center;margin:0 0 .3rem}
.section .sub{text-align:center;color:var(--muted);margin:0 0 2rem}
.feature-grid,.course-grid{display:grid;gap:1.1rem}
@media(min-width:760px){.feature-grid{grid-template-columns:repeat(3,1fr)}.course-grid{grid-template-columns:repeat(2,1fr)}}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem;text-align:center}
.feature .ico{font-size:2.2rem}
.feature h3{margin:.5rem 0 .3rem}
.feature p{color:var(--muted);font-size:.92rem;margin:0}
.course{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.course .cap{position:relative}
.course .cap img{width:100%;height:150px;object-fit:cover;display:block}
.course .age{position:absolute;top:.6rem;left:.6rem;background:var(--ruby);color:#fff;padding:.2rem .7rem;border-radius:999px;font-size:.78rem;font-weight:700}
.course .body{padding:1rem 1.1rem 1.2rem}
.course h3{margin:.1rem 0 .4rem;font-size:1.1rem}
.course p{color:var(--muted);font-size:.9rem;margin:0}
.about{display:grid;gap:1.4rem;align-items:center}
@media(min-width:760px){.about{grid-template-columns:320px 1fr}}
.about img{width:100%;border-radius:var(--radius);box-shadow:var(--shadow)}
.about h2{font-size:1.6rem;margin:.1rem 0 .6rem}
.about p{color:#3a4a41;line-height:1.7}
.cta{background:linear-gradient(120deg,#1e4530,#2e7d52);color:#fff;text-align:center;padding:3.2rem 1.3rem}
.cta h2{font-size:1.8rem;margin:0 0 .4rem}.cta p{opacity:.9;margin:0 0 1.4rem}
.cta .btn{background:#fff;color:var(--leaf);font-size:1.02rem;padding:.8rem 1.6rem}
footer.foot{background:#0f2419;color:#bfe9d2;text-align:center;padding:2rem 1.3rem;font-size:.86rem}
footer.foot a{color:#7fe0a8}
.devbox.home-dev{max-width:420px;margin:1.2rem auto 0}
.article-body h1,.article-body h2,.article-body h3{color:var(--leaf);margin:1.4rem 0 .5rem}
.article-body h2{font-size:1.3rem}.article-body h3{font-size:1.1rem}
.article-body p{margin:.7rem 0}.article-body li{margin:.3rem 0}
.article-body code{background:var(--mint);padding:.1rem .35rem;border-radius:6px;font-size:.9em}

/* ============================================================
   HIGH-FIDELITY HOMEPAGE v2 — parallax · particles · motion
   (later-source overrides win over the v1 block above)
   ============================================================ */
.home{--display:'Baloo 2',-apple-system,"PingFang SC",sans-serif;color:var(--ink);background:#f6fbf7;overflow-x:hidden}
.home h1,.home h2,.navbar b,.hero h1,.section h2.title,.course h3,.feature h3,.about h2,.cta h2{font-family:var(--display);letter-spacing:.2px}

/* nav */
.navbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:.7rem;padding:.55rem 1.2rem;
  background:rgba(246,251,247,.72);backdrop-filter:saturate(1.2) blur(14px);border-bottom:1px solid rgba(46,125,82,.14)}
.navbar img{height:42px;width:42px;border-radius:50%;object-fit:cover;box-shadow:0 4px 14px rgba(26,58,46,.18)}
.navbar b{font-weight:800;font-size:1.02rem;color:#173a29}
.navbar small{color:#5d7a6b}
.navbar .links a{position:relative;color:#1f3a2c;font-weight:600}
.navbar .links a::after{content:"";position:absolute;left:0;right:100%;bottom:-4px;height:2px;background:var(--leaf2);transition:right .3s}
.navbar .links a:hover::after{right:0}

/* hero with layered parallax */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;justify-content:center;text-align:center;
  color:#16302180;overflow:hidden;isolation:isolate}
.hero .layer{position:absolute;inset:-8% -4%;background-size:cover;background-position:center;will-change:transform;pointer-events:none}
.hero .l-canopy{background-image:url('/images/generated/layer-bg-canopy.webp');z-index:0;transform:scale(1.08)}
.hero .l-notes{background-image:url('/images/generated/layer-mid-notes.webp');z-index:1;opacity:.9}
.hero .l-particles{background-image:url('/images/generated/note-particles.webp');background-size:680px;z-index:1;opacity:.5;
  animation:drift 26s linear infinite}
.hero .l-leaves{background-image:url('/images/generated/layer-foreground-leaves.webp');z-index:4;background-position:bottom;
  background-size:contain;background-repeat:no-repeat}
.hero::after{content:"";position:absolute;inset:0;z-index:2;
  background:radial-gradient(110% 80% at 50% 18%,rgba(255,255,255,.34),transparent 55%),linear-gradient(180deg,rgba(231,247,238,.0) 40%,rgba(246,251,247,.92) 96%)}
@keyframes drift{from{background-position:0 0}to{background-position:680px 340px}}
.hero .inner{position:relative;z-index:3;max-width:760px;padding:4rem 1.3rem}
.hero .badge{width:132px;height:132px;border-radius:50%;object-fit:contain;background:rgba(255,255,255,.55);
  box-shadow:0 16px 50px rgba(26,58,46,.30),inset 0 0 0 4px rgba(255,255,255,.7);animation:bob 5s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
.hero h1{font-size:clamp(2.4rem,6vw,4rem);font-weight:800;margin:1.1rem 0 .2rem;color:#15422c;
  text-shadow:0 2px 0 #fff,0 10px 30px rgba(26,58,46,.18)}
.hero .cn{font-family:'Fraunces',serif;font-style:italic;font-size:1.2rem;letter-spacing:.42em;color:#2e7d52;opacity:.95}
.hero .tag{font-size:clamp(1.05rem,2.4vw,1.3rem);margin:1.1rem auto 1.7rem;max-width:24ch;color:#2b4a3a;font-weight:500}
.hero .err{background:rgba(192,57,43,.92);color:#fff;display:inline-block;padding:.45rem 1rem;border-radius:999px;margin-bottom:1rem;font-size:.9rem}
.scroll-cue{margin-top:1.6rem;color:#2e7d52;font-weight:600;font-size:.85rem;opacity:.8;animation:bob 2.4s ease-in-out infinite}

/* buttons get depth + sheen */
.btn{transition:transform .18s,box-shadow .18s,background .2s}
.btn:hover{transform:translateY(-2px)}
.gbtn{transition:transform .18s,box-shadow .18s}.gbtn:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(26,58,46,.2)}

/* sections + reveal */
.section{max-width:1080px;margin:0 auto;padding:4.5rem 1.2rem;position:relative}
.section h2.title{font-size:clamp(1.7rem,3.6vw,2.3rem);color:#173a29}
.section .sub{font-size:1.02rem}
.reveal{opacity:0;transform:translateY(30px)}
.reveal.in{opacity:1;transform:none;transition:opacity .9s cubic-bezier(.2,.7,.2,1),transform .9s cubic-bezier(.2,.7,.2,1)}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}

/* vine divider between sections */
.vine{height:96px;margin:-1rem 0 -1rem;background:url('/images/generated/divider-vine.webp') center/auto 100% no-repeat;opacity:.9}

/* feature (teaching method) cards with real illustrations */
.feature-grid{gap:1.4rem}
.feature{background:linear-gradient(180deg,#ffffff,#f1f9f3);border:1px solid rgba(46,125,82,.14);border-radius:24px;
  padding:1.6rem 1.3rem 1.8rem;box-shadow:0 10px 30px rgba(26,58,46,.07);transition:transform .25s,box-shadow .25s}
.feature:hover{transform:translateY(-6px);box-shadow:0 20px 44px rgba(26,58,46,.14)}
.feature .ico{width:104px;height:104px;margin:0 auto .6rem;background-size:contain;background-position:center;background-repeat:no-repeat}
.feature h3{font-size:1.18rem;color:#173a29}
.feature p{font-size:.94rem;line-height:1.65}

/* course cards with images */
.course-grid{gap:1.4rem}
.course{background:#fff;border:1px solid rgba(46,125,82,.14);border-radius:24px;overflow:hidden;box-shadow:0 10px 30px rgba(26,58,46,.07);
  transition:transform .25s,box-shadow .25s}
.course:hover{transform:translateY(-6px);box-shadow:0 22px 46px rgba(26,58,46,.16)}
.course .cap{position:relative;overflow:hidden}
.course .cap img{height:180px;transition:transform .5s}
.course:hover .cap img{transform:scale(1.06)}
.course .age{background:linear-gradient(120deg,#e25c5c,#ef7a6a);box-shadow:0 6px 16px rgba(226,92,92,.4)}
.course h3{font-size:1.16rem;color:#173a29}

/* about with organic framed cutout */
.about{gap:2rem}
@media(min-width:760px){.about{grid-template-columns:300px 1fr}}
.about .portrait{position:relative;width:280px;margin:0 auto}
.about .portrait img{width:280px;height:280px;border-radius:46% 54% 52% 48%/52% 46% 54% 48%;object-fit:cover;object-position:top center;
  background:radial-gradient(circle at 50% 35%,#eafaef,#d3ecdd);box-shadow:0 18px 44px rgba(26,58,46,.18);animation:morph 12s ease-in-out infinite}
@keyframes morph{0%,100%{border-radius:46% 54% 52% 48%/52% 46% 54% 48%}50%{border-radius:54% 46% 48% 52%/46% 54% 46% 54%}}
.about .leafdec{position:absolute;width:120px;height:120px;right:-18px;top:-26px;
  background:url('/images/generated/decorative-monstera.webp') center/contain no-repeat;mix-blend-mode:multiply;opacity:.9;transform:rotate(8deg)}
.about h2{font-size:1.8rem;color:#173a29}
.about p{color:#334a3e;line-height:1.85;font-size:1rem}

/* games showcase reuse .feature */
#games .feature .ico{font-size:2.6rem;width:auto;height:auto;background:none}

/* CTA with depth */
.cta{position:relative;background:linear-gradient(120deg,#13371f,#2e7d52 70%,#3da16f);color:#fff;text-align:center;padding:4.5rem 1.3rem;overflow:hidden}
.cta::before{content:"";position:absolute;inset:0;background:url('/images/generated/note-particles.webp') center/520px;opacity:.16;animation:drift 30s linear infinite}
.cta h2{font-size:clamp(1.7rem,4vw,2.4rem);position:relative}
.cta p,.cta .btn,.cta .devbox{position:relative}
.cta .btn{box-shadow:0 12px 34px rgba(0,0,0,.25)}

footer.foot{background:#0e2418;padding:2.4rem 1.3rem}

@media(prefers-reduced-motion:reduce){
  .hero .badge,.hero .l-particles,.cta::before,.about .portrait img,.scroll-cue{animation:none}
  .reveal{opacity:1;transform:none}
}

/* ============================================================
   DARK workspace theme — applied only when logged in (body.dark).
   Public homepage & published articles stay light/branded.
   ============================================================ */
body.dark{background:
  radial-gradient(1200px 600px at 80% -10%,#173524 0,transparent 60%),
  radial-gradient(900px 500px at -10% 110%,#123f26 0,transparent 55%),#0b1410}
body.dark .card{background:#15261c;border:1px solid rgba(255,255,255,.08);color:#e7efe9;box-shadow:0 8px 28px rgba(0,0,0,.34)}
body.dark .card h2,body.dark .srow .name,body.dark h2,body.dark h3{color:#eafff2}
body.dark .muted{color:#8fa899}
body.dark th{color:#8db3a0}
body.dark th,body.dark td{border-bottom-color:rgba(255,255,255,.10)}
body.dark .srow{background:#15261c;border-color:rgba(255,255,255,.10)}
body.dark .srow:hover{border-color:var(--leaf2);background:#19301f}
body.dark .avatar{background:#244a35;color:#9fe6bb}
body.dark .kpi{background:#1c3527}
body.dark .kpi b{color:#7fe0a8}
body.dark .kpi span{color:#8fa899}
body.dark .tab{background:#1c3527;color:#c4ecd6}
body.dark .tab.active{background:var(--leaf);color:#fff}
body.dark input,body.dark select,body.dark textarea{background:#0f1d16;border-color:rgba(255,255,255,.15);color:#e7efe9}
body.dark input::placeholder,body.dark textarea::placeholder{color:#6f8a7c}
body.dark .empty{color:#7f9a8c}
body.dark .btn.ghost{background:#15261c;color:#c4ecd6;border-color:rgba(255,255,255,.15)}
body.dark .pill.learning{background:#3a3417;color:#f4cf6b}
body.dark .pill.done{background:#163a24;color:#7fe0a8}
body.dark .pill.material{background:#241f4a;color:#bcacff}
body.dark .studio-cta{box-shadow:0 8px 28px rgba(0,0,0,.34)}
body.dark a{color:#7fe0a8}